Sash-balancer.



No. 782,974. PATENTED FEB. 21, 1905. R. L. LOGKERBIE.

SASH BIALANGER. APPLIGATION FILED 11.20, 1904.

UNITED STATES Patented February 21` 1905.

PATENT OFFICE.

SASH-BALANCER.

SPECIFICATION forming' part of Letters Patent No. 782,974, datedFebruary 21, 1905.

Application filed January 20,1904. Serial No. 189,852.

To roll whmn, it may conccrn:

Be it known that I, ROBERT LIvINes'roNE LooKERBIE,carpenter,of Marystreet, East Invercargill, New Zealand, have invented certain new anduseful Improvements in Sash-Balancers, of which the following' is aspecification.

This invention relates to that class of sashhangers consisting of aroller in or round which a spiral spring is wound, mounted revolubly inbearings in a window-frame or the like, and adapted to wind up cordssecured to a sash or sashes.

A leading' feature of the invention is the specially-constructedtelescoping roller, hereinafter described, whereby its length may bereadily adjusted to suit diiferentwidths and such that it may be readilyremoved from and fixed in its bearings. Another feature is thecontinuous cord extending from one end of said roller to the other endthereof, running round pulleys one at or near each end of the top railof a sash, Whereby evenness of hanging' of the said sash is secured.

The invention consists in these features and in the combination. andarrangement of parts hereinafter described, all more particularlypointed out in the claim. i

In the accompanying drawings the same reference letters and numeralsindicate the same or similar parts.

Figure l shows the apparatus fitted up for hang'ing' a sash. Fig". 2illustrates the method of connecting the cord to the sash. Fig. 3 is aplan view looking' upward to the apparatus fixed overhead. F ig. 4 is across-section through the cover and spring a b, Fig'. l, showing thecasing fitted in a windoW-stile. Fig. 5 shows a pulley in a groove in asash. Fig'. 6 shows the loose spindle drawn out for taking the rollerout of the bearings.

There is a telescoping roller consisting of three portionswnamely, ahollow spindle 1, into which fits slidably a loose spindle 2, the otherend of said loose spindle 2 also fitting slidably into another spindle,3, to which it is secured by a set-screw 4. By these arrangements thelength of the roller can be ad justed to suit the width of the window orother frame. The outer ends 5 6 of the spindles 1 and 3 are respectivclyjournaled in bearings 7 8, secured, respectively, to the sides 9 10 of awindow-frame or the like.

Circular flang'es 11 12 are secured to the outer end of the spindle 1 ata short distance from each other, forming' a reel 13, to which one endof a cord 14 is secured, so that it may be'wound round sa'id reel by therevolution of the roller.

A spiral spring 15 is wound round the spindle 1, one end, 16, of saidspring being secured thereto and the other end, 17, to a D-shaped casing18, surrounding' the spring' 15 and the spindle 1, so that the spring'15 is tightened or released by the revolution of the spindle 1. Thespring is primarily tightened to the deg'ree required, according to theweight of the sash, by turning the casing' or the spindle round. Securedto the casing 18 is a locking-bolt 19, which is adapted to slide into aslot 20 for the purpose of looking the spring' 15 after it has beenwound up to the desired strength. Circular flanges 21 22 are secured tothe outer end of the spindle 3 at a short distance from each other,forming' a reel 23, to which the other end of the cord 14 is secured, sothat it may be wound around said reel by the revolution of the roller.The cord 14 passes from the reel 13 under a pulley 24, mounted,preferably, in a groove in the top rail 25 of a sash at one end thereof,thence along said groove and under another pulley, 26x, similarlymounted at the other end of the rail 25, and upward to the reel 23. Bythis arrang'ement of the cord the sash is hung evenly balanced. Inoperation the cord 14 is secured by one end to the reel 13 and passedunderneath the pulleys 24 and 26x, and the other end of the cord issecured to the reel 23. One end of the loose spindle 2 is insertedWithin the hollow spindle 1, and the other end is inserted within thespindle 3. The spring' 15 is wound up to the strength required to raisethe sash easily with a slight assistance by the hand by turning theroller or the casing, and it is then locked by the locking-bolt 19 beinginserted in the slot 20. The outer ends 5 and 6 of the spindles 1 and 3are then respectively inserted in the bearing's 7 and 8,

and the spindles l and 3 are drawn apart, so that the roller lits theframe. The set-screw 4; is then tightened, clamping the loose spindle 2to the spindle 3. The casing' 18 is prevented from revolving' by theface of plate 26 engaging against the edges of an opening in the stile27. When two sashes are to be hung' one above the other, as in the caseof a window, two sets of the apparatus are used, one being' seeuredalongside the other as before descx'ibed. The roller may be securedupside down to the top rail, and the eord is then litted to run inpulleys in a groove in the stile or frame.

The bolt 19 is withdrawn from the slot 20 as soon as the sash isattached to the cords, so as to allow the i'oller and spring to operate,the weight of the sash preventing the spring' from unwinding tooquickly. The bolt is only used as a lock when the roller is to be takendown, when it 1s down, and when 1t is being put back into place, itspurpose being to prevent the spring from unrolling' when the weight ofthe sash is taken off it.

Having' now particularly deseribed my in- Vention, I deelare that what Iclaim as new, and desire to secure by Letters Patent, is-

In combination a roller consisting of three portions the two eXteriorportions being hollow spindles and the central portion being a loosespindle slidable in said hollow spindles, a setscrew, bearings for theouter ends of said hollow spindles, two eircular fianges on each hollowspindle, a spiral spring on one hollow spindle, a casing surroundingsaid spring and spindle, and a locking-boltbetween the casino' and anadjacent fiange.

In testimony whereof I have hereunto set my hand in presence of twowitnesses.

ROBERT LIVINGSTONE LOCKERBIE.

VVitnesses:

EUs'rAoE RUss'ELL, R. M. JonNsoN.

